.splash-screen {  
    position: fixed;  
    top: 0;  
    left: 0;  
    right: 0;  
    bottom: 0;  
    display: flex;  
    justify-content: center;  
    align-items: center;  
    background-color:antiquewhite;
    background-image: url('../assets/jiajule.png');
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    flex-direction: column;  
}  

 